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Cover
Jul. 29, 2021
Apr. 29, 2021
Cover [Abstract]    
Document Type 8-K  
Document Period End Date Jul. 29, 2021  
Entity Registrant Name CBRE GROUP, INC.  
Entity Incorporation, State or Country Code DE  
Entity File Number 001-32205  
Entity Tax Identification Number 94-3391143  
Entity Address, Address Line One 2100 McKinney Avenue  
Entity Address, Address Line Two Suite 1250  
Entity Address, State or Province TX  
Entity Address, City or Town Dallas  
Entity Address, Postal Zip Code 75201  
Local Phone Number 979-6100  
City Area Code (214)  
Title of 12(b) Security Class A Common Stock, $0.01 par value per share  
Trading Symbol “CBRE”  
Security Exchange Name NYSE  
Written Communications false  
Soliciting Material false  
Pre-commencement Tender Offer false  
Pre-commencement Issuer Tender Offer false  
Entity Emerging Growth Company false  
Entity Central Index Key   0001138118
Amendment Flag   false